Drinking straw cover



FIG. 1 is a magnified elevated perspective view of a drinking straw cover placed on an end of a drinking straw;

FIG. 2 is a side view of the drinking straw cover placed on an end of a drinking straw; and,

FIG. 3 is a bottom view of the drinking straw cover placed on an end of a drinking straw.

The broken line showing of a portion of a drinking straw is included for the purpose of illustration and forms no part of the claimed design. 

CLAIM The ornamental design for a drinking straw cover, as shown and described. 